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Why does my computer power supply not have 5 Volts

Last response: in Systems
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December 30, 2010 12:33:30 AM

Hello,
why does my computer power supply show 3 volts and 12 volts but not 5 volts?
a b ) Power supply
December 30, 2010 5:02:23 AM

don't know and you posted in the wrong section.

There should be a 5 volt lead since the hard drive uses both 5v and 12v.
Anonymous
a b ) Power supply
December 30, 2010 8:10:44 AM

This topic has been moved from the section Computer Peripherals to section Systems by Fihart
a c 104 ) Power supply
December 30, 2010 2:43:37 PM

You must be referring to the -5V rail. That rail is obsolete. It was used by some AT expansion cards way back when. Very few PSUs have it any more, and those that do I would not trust to be of sufficient quality to power a modern PC.
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